package 比赛.chuanZhiMoNi;

import java.util.Scanner;

public class E {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        int money = sc.nextInt();

        int total = 0;
        for(int i = 0; i< num; i++){
            total += sc.nextInt();
        }
        if(total- num/2 <= money)
            System.out.println("Yes");
        else System.out.println("No");
    }
}
